CVE-2026-54289 (GCVE-0-2026-54289)

Vulnerability from cvelistv5 – Published: 2026-06-22 17:16 – Updated: 2026-06-22 18:19
VLAI
Title
Hono: Lambda@Edge adapter keeps only the last value of a repeated request header, dropping the rest
Summary
Hono is a Web application framework that provides support for any JavaScript runtime. Prior to 4.12.25, on AWS Lambda@Edge, CloudFront delivers a request header that appears more than once as several separate entries. The adapter writes each value with Headers.set instead of Headers.append, so every value overwrites the previous one and only the last reaches the application. Repeated request headers such as X-Forwarded-For, Forwarded, and Via are silently truncated to a single value. Request middleware sees only the last value of a repeated header instead of the full chain. For applications that base access control on the X-Forwarded-For chain, this can weaken or alter that decision; for auditing, hop history is lost. This vulnerability is fixed in 4.12.25.
Severity
4.8 (Medium)
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:L/A:N
SSVC
Exploitation: poc Automatable: no Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-06-22 18:19 UTC
CWE
  • CWE-348 - Use of Less Trusted Source
Assigner
GitHub_M CNA under the mitre root
CNA scorecard C 72/100 over 8129 records in the last 180 days details
References
Impacted products
Vendor Product Version CPE status
honojs hono Affected: < 4.12.25
guessed Create a notification for this product.
Show details on NVD website
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